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    • Li-rich layered composite Li[Li 0.2 Ni 0.2 Mn 0.6 ]O 2 synthesized by a novel approach as cathode material for lithium ion battery

    锂离子电池正极材料Li[Li0.2Ni0.2Mn0.6]O2的新合成方法

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    出版日期： 2013
    标签： Li-rich Layer structure Cathode material Carbon felt Lithium ion battery

    出版日期:2013

    作者单位:aBeijingKeyLaboratoryofEnvironmentalScienceandEngineering,SchoolofChemicalEngineeringandEnvironment,BeijingInstituteofTechnology,Beijing100081,ChinabNationalCenterforMaterialsServiceSafety,UniversityofScienceandTechnologyBeijing,Beijing100083,China
    杂志名称:Journal of Power Sources
    卷号:230
    期数:Complete
    刊号:0378-7753
    出版日期:2013

    简介:Li-richlayeredcompositeLi[Li0.2Ni0.2Mn0.6]O2ispreparedbyanovelapproachinwhichcarbonfeltactsasacarrierforsynthesisreaction.Theas-preparedmaterialischaracterizedbySEM,ICPandXRD,itselectrochemicalperformanceisalsoexaminedwithgalvanostaticcharge/dischargeandCVmeasurements.Itisshowedthatthefacileprocesscontrolseffectivelytheparticlegrowth(insizearound100-200?nm)ofthecompositeanditschemicalcomposition.Theas-preparedmaterialshowsahighinitialdischargecapacityabout288?mAh?g?whenchargedto4.8?V,andaretainedvalueof246.8?mAh?g?inthe40thcycle.ThecrystallinestructureofthecompositeissimulatedfurtherbyMaterialStudio.ItisrevealedthatthecompositehasacompatiblelayerstructuremergedbyLi2MnO3andLiNi0.5Mn0.5O2,whichmakessubstantialcontributiontothecycleabilityoftheelectrode.Inaddition,thelithiation/delithiaionpropertiesincludingchargetransferresistanceandlithiumiondiffusioncoefficientarestudiedwithelectrochemicalimpedancespectra.

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